Met Police have closed the roads around Nine Elms Lane as a precaution, and say they have been at the scene trying to engage with the man for several hours.
It has now emerged that the man is a 69-year-old protestor carrying out a 'death-defying daredevil act of solidarity for Palestine', according to pro-Palestine activist account on Twitter.
The man is up there with 'no safety net', and he is reportedly planning on remaining up on the crane, overlooking Vauxhall Bridge, 'for days'.
A Met spokesman said: "Our priority is the man's safety and officers are attempting to speak to him. As yet, he has not engaged with any of the officers on the ground."
Major disruption is expected due to the incident this morning, and drivers are urged to find an alternative route.
Wandsworth Police shared the update in a Twitter post, stating a man had climbed to the top of a crane on abuilding site in Nine Elms Lane.
The crane is likely part of the One Nine Elms construCtion project to build a 200 metre tall skyscraper by the River Thames, costing around £1 billion.
